<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>https://codepen.io/prvnbist/pen/gKParr</title>
    <style>

        *, *:before, *:after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html, body {
            height: 100%;
        }

        body:before, body:after {
            content: "";
            display: block;
            height: 50%;
            background: #00bdea;
        }
        body:after {
            background: #208FF9;
        }

        /* MAIN VARIABLES FOR CUSTOMIZATION */
        /* -------------------------------- */
        .nav {
            overflow: hidden;
            position: absolute;
            left: 50%;
            top: 50%;
            width: auto;
            height: 90px;
            margin-top: -45px;
            background: #fff;
            border-radius: 5px;
            transform: translate3d(-50%, 0, 0);
            box-shadow: 0 10px 35px rgba(0, 0, 0, 0.2);
        }
        .nav__cb {
            z-index: -1000;
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            pointer-events: none;
        }
        .nav__content {
            position: relative;
            width: 90px;
            height: 100%;
            transition: width 1s cubic-bezier(0.49, -0.3, 0.68, 1.23);
        }
        .nav__cb:checked ~ .nav__content {
            transition: width 1s cubic-bezier(0.48, 0.43, 0.29, 1.3);
            width: 410px;
        }
        .nav__items {
            position: relative;
            width: 410px;
            height: 100%;
            padding-left: 20px;
            padding-right: 110px;
            list-style-type: none;
            font-size: 0;
        }
        .nav__item {
            display: inline-block;
            vertical-align: top;
            width: 70px;
            text-align: center;
            color: #6C7784;
            font-size: 14px;
            line-height: 90px;
            font-family: Helvetica, Arial, sans-serif;
            font-weight: bold;
            perspective: 1000px;
            transition: color 0.3s;
            cursor: pointer;
        }
        .nav__item:hover {
            color: #00bdea;
        }
        .nav__item-text {
            display: block;
            height: 100%;
            transform: rotateY(-70deg);
            opacity: 0;
            transition: transform 0.7s cubic-bezier(0.48, 0.43, 0.7, 2.5), opacity 0.7s;
        }
        .nav__cb:checked ~ .nav__content .nav__item-text {
            transform: rotateY(0);
            opacity: 1;
            transition: transform 0.7s cubic-bezier(0.48, 0.43, 0.7, 2.5), opacity 0.2s;
        }
        .nav__item:nth-child(1) .nav__item-text {
            transition-delay: 0.3s;
        }
        .nav__cb:checked ~ .nav__content .nav__item:nth-child(1) .nav__item-text {
            transition-delay: 0s;
        }
        .nav__item:nth-child(2) .nav__item-text {
            transition-delay: 0.2s;
        }
        .nav__cb:checked ~ .nav__content .nav__item:nth-child(2) .nav__item-text {
            transition-delay: 0.1s;
        }
        .nav__item:nth-child(3) .nav__item-text {
            transition-delay: 0.1s;
        }
        .nav__cb:checked ~ .nav__content .nav__item:nth-child(3) .nav__item-text {
            transition-delay: 0.2s;
        }
        .nav__item:nth-child(4) .nav__item-text {
            transition-delay: 0s;
        }
        .nav__cb:checked ~ .nav__content .nav__item:nth-child(4) .nav__item-text {
            transition-delay: 0.3s;
        }
        .nav__btn {
            position: absolute;
            right: 0;
            top: 0;
            width: 90px;
            height: 90px;
            padding: 36px 31px;
            cursor: pointer;
        }
        .nav__btn:before, .nav__btn:after {
            content: "";
            display: block;
            width: 28px;
            height: 4px;
            border-radius: 2px;
            background: #096DD3;
            transform-origin: 50% 50%;
            transition: transform 1s cubic-bezier(0.48, 0.43, 0.29, 1.3), background-color 0.3s;
        }
        .nav__btn:before {
            margin-bottom: 10px;
        }
        .nav__btn:hover:before, .nav__btn:hover:after {
            background: #00bdea;
        }
        .nav__cb:checked ~ .nav__btn:before {
            transform: translateY(7px) rotate(-225deg);
        }
        .nav__cb:checked ~ .nav__btn:after {
            transform: translateY(-7px) rotate(225deg);
        }
    </style>
</head>
<body type="pug">
<nav class="nav">
    <input type="checkbox" class="nav__cb" id="menu-cb"/>
    <div class="nav__content">
        <ul class="nav__items">
            <li class="nav__item">
        <span class="nav__item-text">
          Home
        </span>
            </li>
            <li class="nav__item">
        <span class="nav__item-text">
          Works
        </span>
            </li>
            <li class="nav__item">
        <span class="nav__item-text">
          About
        </span>
            </li>
            <li class="nav__item">
        <span class="nav__item-text">
          Contact
        </span>
            </li>
        </ul>
    </div>
    <label class="nav__btn" for="menu-cb"></label>
</nav>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r77/three.min.js"></script>
<script>

</script>
</body>
</html>